A minor update to Word Mix (and Lite) will be released in the next couple of days.  The updates will include offline score storage.  This will allow your score to be stored on your device and uploaded to the leader board automatically when you have an internet connection.  Your score will also be portable.  So, if you get a new device, reinstall the app, purchase Word Mix after playing Word Mix Lite for a while, when you sign into your OpenFeint account you will be able to migrate your scores over to the new install.  Other updates include some dictionary updates and minor bug fixes.